title: New bioactive triterpenoids from Melia volkensii.
abstract: Bioactivity-directed fractionation of the root bark of Melia volkensii resulted in the isolation of two new natural products, meliavolkinin (1) and melianin C (3), together with two known compounds, 1,3-diacetylvilasinin (2) and melianin B (4). Jones oxidation of 4 gave compounds 3, 23,24-diketomelianin B (5), and 16,23,24-triketomelianin B (6). The structures of the new compounds were elucidated by spectral and chemical data. Compounds 1-6 all showed marginal cytotoxicities against certain human tumor cell lines, while 5 showed selective cytotoxicities for the human prostate (PC-3) and pancreatic (PACA-2) cell lines with potencies comparable to those of adriamycin.
authors.affiliation: Department of Medicinal Chemistry and Molecular Pharmacology, School of Pharmacy and Pharmacal Sciences, Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: L L
authors.initials: LL
authors.lastname: Rogers
authors.forename: L
authors.initials: L
authors.lastname: Zeng
authors.forename: J F
authors.initials: JF
authors.lastname: Kozlowski
authors.forename: H
authors.initials: H
authors.lastname: Shimada
authors.forename: F Q
authors.initials: FQ
authors.lastname: Alali
authors.forename: H A
authors.initials: HA
authors.lastname: Johnson
authors.forename: J L
authors.initials: JL
authors.lastname: McLaughlin
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification* / Q000494:pharmacology; D004317:Doxorubicin / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D010946:Plants, Medicinal / Q000737:chemistry*; D011471:Prostatic Neoplasms / Q000188:drug therapy; D014315:Triterpenes / Q000302:isolation & purification* / Q000494:pharmacology; D014407:Tumor Cells, Cultured
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D014315:Triterpenes; C110797:maliavolkinin; C110796:melianin C; D004317:Doxorubicin